Cross-head pump.



No. 788,457. PATENTED APR. 25, 1905.'

J. G. FAIRBANKS 82; G. L. SAUBR.

(moss HEAD PUMP.

APPLICATION FILED JAN. 3. 1905.

LEI/ 7w Gfkz'rba i zl'a Ins gntors Witn sses v UNITED STATES Patented April 25, 1905.

PATENT OFFICE.

JAMES G. FAIRBANKS AND GEORGE L. SAUER, OF MARION, OHIO.

CROSS-HEAD PUMP.

SPECIFICATION forming part of Letters Patent No. 788,457, dated April 25, 1905.

Application filed January 3, 1905. Serial No. 239,474.

To all whom, it may concern.-

Be it known that we, JAMES G. FAIRBANKS and GEORGE L. SAUER, citizens of the United States, residing at Marion, in the county of Marion and State of Ohio, have invented a new and useful Cross-Head Pump, of which the following is a specification.

This invention relates to improvements in cross-head pumps of that type generally employed as boiler-feeders for traction-engines, agricultural machines, and the like.

The principal object of the invention is to provide a novel form of cross-head pump in which any adjustment of the cross-head or any wear on either the cross-head or on its guides or on the piston of the engine will not in any manner affect the operation of the pump, the connection between the crosshead and pump-plunger being of a nature to permit a considerable amount of independent movement of the cross-head withoutjamming the plunger or causing excessive Wear on any of its parts.

WVith these and other objects in view, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings,and particularlypointed out in the appended claims, it being understood that various changes in the form, proportions, size, and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawings, Figure 1 is a side elevation of a cross-head pump constructed in accordance with the invention. Fig. 2 is a detail perspective view of a portion of the device.

Similar numerals of reference are employed to indicate corresponding parts throughout both figures of the drawings.

In traction-engines, land-rollers, and agricultural machines of various kinds it is usual to employ what are known as cross-head pumps for the purpose of feeding water to the boiler. These are generally arranged in front of the cross-head guides, one end of the pumping-cylinder being usually secured to I or its connections.

the lower guide and the plunger being rigidly secured to the cross-head, so that as the latter reciprocates the plunger will receive corresponding movement. In practice it is found that owing to wear on the cross-head or its guides or from wear on the piston of the engine or rod or local derangement from other causes there is a tendency of the plunger to jam in the pumping-cylinder, and this results not'only in excessive friction and wear, but in many cases in breakage of the plunger In carrying out the present invention provision is made for allowing perfect freedom of movement of the crosshead and any adjustment which may be necessary without danger of any injury to the pump.

The boiler 10 of the traction-engine supports the cylinder 11 and cross-head guides 12 in the usual manner, and between these guides plays a cross-head 15, forming a connection between the piston-rod 16 and the connecting-rod 17.

At a point below the cross-head is arranged a feed-pump cylinder 18, that is provided at one end with a stuffing-box 19 of the usual construction. In this cylinder is arranged a reciprocating plunger 20, the rod 21 of which is extended for some distance toward the for ward head of the cylinder 11 and is supported in a guiding-bracket 22, so that its axial line may always be the same as that of the feedpump cylinder. On a rod 21 are secured two rigid collars or nuts 23, and between these fits the bifurcated lower end of an opcrating-arm 24, the upper end of said arm being secured to the cross-head by bolts 25 or other suitable fastening devices.

In the operation of the engine thecrosshead or its guides may become worn to such an extent that the arm 24 will be slightly lowered, or adjustment may be made which will slightly raise the arm from the position shown; but in all cases the length of the space between the bifurcated arms at the lower end of the arm is suflicient to allow its movement without danger of anybinding action between the arm and the plunger-rod, so that there will be no transverse stress on the plungerrod and no tendency to uneven wear or undue friction from following the movement of the cross-head.

WVith a cross-head pump arranged and connected in the manner described it is obvious that some of the practical disadvantages eX- isting in ordinary pumps of the same general class will be remedied and that the life of the pump will be materially increased.

Having thus described the invention, what is claimed is 1. In a cr0ss-head feed-pump, for tractionengines and the like, the combination with the engine having cross-head guides, of a cross-head, a feed-pump cylinder disposed in parallel relation with the cross-head guides, a plunger arranged within said cylinder, a plunger-rod, a plunger-rod guide secured to the cross-head guide, and a connecting-arm extending between the cross-head and the plunger-rod and arranged to permit variations in the distance between. said cross-head and plunger.

2. In feed-pumps for tractionengines, the

combination with an engine having crosshead guides, of a cross-head, a feed-pump cylinder arranged below and in parallel relation with said cross-head guides, a plunger disposed within the cylinder, a plunger-rod, a plunger-rod guide secured to the cross-head guide and in alinement with the axis of the cylinder, a pair of collars on said plungerrod, and an arm secured to the cross-head, said arm having a bifurcated lower end fitting snugly between said collars and over the plunger-rod, the length of the bifurcated portion of the arm being suflicient to permit variations in the distance between the crosshead and the plunger-rod.

In testimony that we claim the foregoing as our own we have hereto affixed our signatures in the presence of two witnesses.

JAMES G. FAIRBANKS. GEO. L. SAUER. Witnesses:

ADAM BAUER, FRANK G. NORTON. 

